Approaches for calculating alignment and orientation of photoionized open shell atoms

Abstract

A method is proposed for calculating alignment and orientation for open shell atoms after photoionization of an inner shell by relating the open shell dipole matrix elements to those independent of the outer open shell configuration. Thus, an extended and usually non-trivial numerical open shell approach is avoided. Our method can be applied to different configuration potentials which is illustrated by Hartree–Fock calculations of alignment and orientation which have been performed for the L3 photoionization of K, Au, Sc and Mn, and for the M5 and N7 photoionization of In and Tl, applying different numerical approaches. Dramatic effects have been found for Mn. The alignment of Au is compared to the experiment.

Non-isotropic angular distribution of Yb Lα1and Lα2lines following photoionization by linearly polarized radiation

“…The decay of the L 3 subshell vacancies following an ion-atom collision and electron-atom collision has been investigated experimentally [1][2][3][4][5][6][7][8][9][10][11][12] and theoretically [13][14][15][16][17] for many decades. It is well established that vacancies created in such ion-atom collisions with angular momentum J > 1/2 are aligned.…”